Abstract

We have constructed and made available atomic and molecular (AM) numerical databases on collision processes such as electron‐impact excitation and ionization, recombination and charge transfer of atoms and molecules relevant for plasma physics, fusion research, astrophysics, applied‐science plasma, and other related areas. The retrievable data is freely accessible via the internet. We also work on atomic data evaluation and constructing collisional‐radiative models for spectroscopic plasma diagnostics. Recently we have worked on Fe ions and W ions theoretically and experimentally. The atomic data and collisional‐radiative models for these ions are examined and applied to laboratory plasmas. A visible M1 transition of
ion is identified at 389.41 nm by EBIT experiments and theoretical calculations. We have small non‐retrievable databases in addition to our main database. Recently we evaluated photo‐absorption cross sections for 9 atoms and 23 molecules and we present them as a new database. We established a new association “Forum of Atomic and Molecular Data and Their Applications” to exchange information among AM data producers, data providers and data users in Japan and we hope this will help to encourage AM data activities in Japan.